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The Sixth Data Release of the Sloan Digital Sky Survey

2008; Institute of Physics; Volume: 175; Issue: 2 Linguagem: Inglês

10.1086/524984

1538-4365

Jennifer Adelman-McCarthy, Marcel A. Agüeros, S. Allam, Carlos Allende Prieto, Kurt S. Anderson, Scott F. Anderson, James Annis, Neta A. Bahcall, C. A. L. Bailer‐Jones, I. K. Baldry, John C. Barentine, Bruce A. Bassett, A. C. Becker, Timothy C. Beers, Eric F. Bell, Andreas A. Berlind, Mariangela Bernardi, Michael R. Blanton, John J. Bochanski, William N. Boroski, J. Brinchmann, J. Brinkmann, Robert J. Brunner, Tamás Budavári, Samuel Carliles, Michael A. Carr, F. J. Castander, David Cinabro, R. J. Cool, Kevin R. Covey, István Csabai, Carlos E. Cunha, James R. A. Davenport, B. Dilday, Mamoru Doi, Daniel J. Eisenstein, Michael L. Evans, Xiaohui Fan, Douglas P. Finkbeiner, S. D. Friedman, Joshua A. Frieman, M. Fukugita, B. T. Gänsicke, Evalyn Gates, Bruce Gillespie, Karl Glazebrook, Jim Gray, E. K. Grebel, James E. Gunn, Vijay K. Gurbani, Patrick B. Hall, Paul Harding, Michael Harvanek, Suzanne L. Hawley, J. J. E. Hayes, Timothy M. Heckman, John S. Hendry, Robert B. Hindsley, Christopher M. Hirata, Craig J. Hogan, David W. Hogg, Joseph Hyde, Shinichi Ichikawa, Željko Ivezić, Sebastian Jester, Jennifer A. Johnson, A. M. Jorgensen, Mario Jurić, S. Kent, R. Keßler, S. J. Kleinman, G. R. Knapp, R. G. Kron, J. Krzesiński, N. Kuropatkin, Donald Q. Lamb, Hubert Lampeitl, Svetlana Lebedeva, Young Sun Lee, R. French Leger, Sébastien Lépine, M. Lima, H. Lin, Daniel C. Long, Craig Loomis, J. Loveday, Robert H. Lupton, O. Malanushenko, Viktor Malanushenko, Rachel Mandelbaum, B. Margon, J. Marriner, David Martínez‐Delgado, Takahiko Matsubara, P. McGehee, Timothy A. McKay, Avery Meiksin, Heather Morrison, Jeffrey A. Munn, Reiko Nakajima, Eric H. Neilsen, Heidi Jo Newberg, Robert C. Nichol, Tom Nicinski, M. A. Nieto‐Santisteban, A. Nitta, Sadanori Okamura, Russell Owen, Hiroaki Oyaizu, Nikhil Padmanabhan, Kaike Pan, Changbom Park, J. Peoples, Jeffrey R. Pier, Adrian Pope, Norbert Purger, M. Jordan Raddick, P. Re Fiorentin, Gordon T. Richards, M. Richmond, Adam G. Riess, Hans‐Walter Rix, Constance M. Rockosi, Masao Sako, David J. Schlegel, Donald P. Schneider, M. R. Schreiber, A. Schwope, Uroš Seljak, Branimir Sesar, E. Sheldon, K. Shimasaku, T. Sivarani, J. A. Smith, Stephanie A. Snedden, Matthias Steinmetz, Michael A. Strauss, Mark SubbaRao, Yasushi Suto, Alexander S. Szalay, István Szapudi, Paula Szkody, Max Tegmark, Aniruddha R. Thakar, Christy Tremonti, D. L. Tucker, Alan Uomoto, D. E. vanden Berk, Jan Vandenberg, S. Vidrih, Michael S. Vogeley, W. Voges, Nicole P. Vogt, Yogesh Wadadekar, David H. Weinberg, Andrew A. West, Simon D. M. White, Brian C. Wilhite, B. Yanny, D. R. Yocum, Donald G. York, Idit Zehavi, D. B. Zucker,

Astronomy and Astrophysical Research

This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and parameters of roughly 287 million objects over 9583 deg2, including scans over a large range of Galactic latitudes and longitudes. The survey also includes 1.27 million spectra of stars, galaxies, quasars, and blank sky (for sky subtraction) selected over 7425 deg2. This release includes much more stellar spectroscopy than was available in previous data releases and also includes detailed estimates of stellar temperatures, gravities, and metallicities. The results of improved photometric calibration are now available, with uncertainties of roughly 1% in g, r, i, and z, and 2% in u, substantially better than the uncertainties in previous data releases. The spectra in this data release have improved wavelength and flux calibration, especially in the extreme blue and extreme red, leading to the qualitatively better determination of stellar types and radial velocities. The spectrophotometric fluxes are now tied to point-spread function magnitudes of stars rather than fiber magnitudes. This gives more robust results in the presence of seeing variations, but also implies a change in the spectrophotometric scale, which is now brighter by roughly 0.35 mag. Systematic errors in the velocity dispersions of galaxies have been fixed, and the results of two independent codes for determining spectral classifications and redshifts are made available. Additional spectral outputs are made available, including calibrated spectra from individual 15 minute exposures and the sky spectrum subtracted from each exposure. We also quantify a recently recognized underestimation of the brightnesses of galaxies of large angular extent due to poor sky subtraction; the bias can exceed 0.2 mag for galaxies brighter than r = 14 mag.